What is the difference between wcdma and hsdpa 3G networks?

[Ádám]

[Alex]

1. HSDPA uses WCDMA with 16 QAM modulation technique and original WCDMA networks use QPSK as the modulation scheme.

2. WCDMA fro 3G networks are capable of providing data rates up to 2Mbps and HSDPA is capable of proving downlink data rates up to 14.4 Mbps.

3. Fast HARQ (Hybrid Automatic Repeat Request) is being used in HSDPA networks and traditional WCDMA networks don’t use this feature.

4. HSDPA hand sets are categorized in to 12 according to TTI, Transport Block Size, modulation schemes etc used for HSDPA networks and WDMA networks doesn’t categorized like that in original 3G network deployment.